According to question simple example:
May 16, seller set a transfer of house (A) at my nick for 60kk (I have only 20kk in bank).
May 16, I set a transfer of house (B) for 60kk to other customer.
What will happen after SS at 17 May?
1.Will I get house (A), will sell house (B), bank balance 20kk
2.Will sell house (B), not get house (A), bank balance 80kk